FOOTNOTES:
[12] As this phrase is not self-explanatory—like cross-bearings from two points ashore—some readers may like to be reminded of the elementary geometry involved in the method here referred to of determining a position by the aid of a single known point. Having got his four-point (45°) bearing, he would proceed on the same course till he got an eight-point (90°) bearing. In a right-angled triangle, of which one of the other angles is 45°, the remaining angle is also 45°. The sides opposite these equal angles are also equal. That is to say, the distance from the rock (which is what he wants to know) is equal to the distance run between the times of taking the two bearings (which he can determine by log-speed and allowances for current, etc.).
[13] A message of Count Bernstorff's, quoted in the Times of 25th May, 1918, mentions that there were numerous private wireless receiving stations in Ireland. The German news reports, sent out to all the world by the great Nauen station, would be easy to pick up, and amid a long succession of news items a cleverly chosen code word—meaning by pre-arrangement, 'Expedition started,' or the like—would easily escape notice, except from those who were on the look-out for it.
[14] This name does not appear in the list of auxiliary craft in the Navy List for April, 1916.